Hylaeus extensus, or Hylaeus (Heterapoides) extensus, is a species of bee in the family Colletidae and subfamily Hylaeinae. It is endemic to Australia. It was described by British-American entomologist Theodore Dru Alison Cockerell in 1916.
Description Female body length is about 4 mm. Integumental colouration is mainly black, with yellow to reddish markings.
Distribution and habitat The species occurs in eastern Australia. The type locality is Mount Yule, near Healesville in Victoria.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Callistemon, Daviesia, Eucalyptus, Jacksonia, Leptospermum, Melaleuca, Tristaniopsis and Xanthorrhoea species.
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